In the April 2018 update, Microsoft introduced a new security feature where when setting up a local account, Windows will prompt you to choose three security questions and answer them. This is not an optional feature, you have to choose and answer security questions when creating a local account.
Windows 10 users who are using Microsoft account to log in don't have to deal with security questions.
As you can imagine, this feature is quite useful when you forget the Windows password. In previous versions of Windows, if you forget the password, you have to use the password reset disk. Which, let's be frank, almost no Windows user bothers to create one. Otherwise, you have to go through a variety of things like removing the user account, removing the password, Command Prompt hacks, etc.
With the introduction of the security questions, resetting Windows password is easy. All you have to do is click on the Reset Password link on the Windows login screen.
If you forgot the security questions or if you need to change them because they are compromised, you can easily change security questions on Windows 10 from the Settings app. Here's how to do it.
Change Security Questions on Windows 10
Like I said, security questions are only applied for Local accounts. To change security questions you can use the Settings app.
1. Open Settings app on Windows 10 using the shortcut
I. You can also search for and open it from the Start Menu or from the Notification Center.
2. In the Settings app, go to "Accounts -> Sign-in Options." Click on the link "Update your security questions" under the "Password" section.
3. You will be prompted to enter your user account password. Enter the password and click on the "Ok" button.
4. Now, select questions from the drop-down menus, enter the answers and click "Finish" to change security questions on Windows 10.
That's about it. You've successfully changed security questions for local accounts on Windows 10.
Reset Local Account Password on Windows 10
In the event you forgot your password, click on the "Reset Password" link on the login screen. The link will appear after one failed login attempt. Now, enter all the answers to the security questions and press Enter to reset local account password on Windows 10.
Detailed instructions: Reset local user account password on Windows 10
Hope that helps. Comment below if you face any problems while changing security questions for local accounts on Windows 10.